Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Deficit, Preferred Units (Details)

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Stockholders' Deficit, Preferred Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended
Feb. 12, 2019
Dec. 12, 2018
Dec. 31, 2018
May 06, 2019
Class of Stock [Line Items]        
Unit price (in dollars per share)   $ 1.95    
Net proceeds from issuance of stock   $ 2,700    
Share issuance costs   $ 100    
Series A Preferred Units [Member]        
Class of Stock [Line Items]        
Shares issued in private placement (in shares) 62,500   2,162,536  
Unit price (in dollars per share) $ 2.40   $ 2.40  
Net proceeds from issuance of stock $ 200   $ 4,700  
Share issuance costs     $ 500  
Shares issued in stock conversion (in shares)       2,460,517